改性膨润土助凝消除水体中全氟辛烷磺酸盐  

Elimination of perfluorooctane sulphonate in water by coagulation with assistance of modified bentonite

作　　者：孙建强[1] 洪雷[1] 贾旭日 SUN Jianqiang;HONG Lei;JIA Xuri(School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou Gansu 730070)

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃兰州730070

出　　处：《环境污染与防治》2018年第7期733-736,742,共5页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.21277065)

摘　　要：以十六烷基三甲基溴化铵(CTMAB)微波改性膨润土(CTMAB-膨润土)作为助凝剂,采用聚合氯化铝(PAC)联用CTMAB-膨润土进行强化混凝实验,对水体中全氟辛烷磺酸盐(PFOS)的消除进行研究。结果表明:经微波改性后,CTMAB进入到膨润土层间,增大了膨润土层间距;PAC的最佳投加量为15mg/L;强化混凝最佳pH为6~7;PFOS去除率随原水浊度的增大而增大;在同等条件下CTMAB-膨润土对PFOS去除率整体优于粉末活性炭。Bentonites modified by cetyltrimethyl ammonium bromide was used as coagulant aid.Elimination of perfluorooctane sulphonate(PFOS)in water by combining Poly Aluminium Chloride(PAC)with CTMAB-bentonite were conducted in this work.The results showed that CTMAB intercalated into bentonite and enlarging the layer space,after microwave modification.The optimum dosage of PAC was 15 mg/L,and the best pH for enhanced coagulation was 6-7,and the removal rate of PFOS increased with the increasing of the original water turbidity,and the PFOS removal rate of CTMAB-bentonite was better than that of powdered activated carbon under the same condition.

关 键 词：十六烷基三甲基溴化铵微波改性膨润土 全氟辛烷磺酸盐 强化混凝 聚合氯化铝 

分 类 号：X52[环境科学与工程—环境工程]